Fennel

Like Urn, Fennel is a lisp which compiles to Lua and is often used together with the LÖVE framework. It is different from Urn in that it sticks much closer to Lua's semantics; all differences are at compile time, and no runtime overhead is introduced. This results in a dramatically simpler compiler with readable output. In addition, it is much more friendly to interactive development (working from a repl) compared to Urn, though Urn has more features.